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1.There is a dimple at the lumbar region - that will suspect any congenital spinal abnormality.
2.This is usually seen at the time of the
pregnancy scans itself, if it was significant.
3.The abnormality could be insignificant, in this case if baby is holding urine for a while and limb movement normal - things nothing much to worry in this case as emergency.
4.But
MRI need to be done as to see the spinal chord, the covering - weather intact or not.
Ultrasound do gives the information but definitive view can be seen in the MRI.
5.Do not worry - every doctor want to make sure there is no abnormality in the spine and spinal chord, if there which can be rectified. Hope the best.
Good luck.
Hope i have answered your query,
any thing to ask ? do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888